Formal Review of std.process

[Jesse Phillips]

Oops, forgot the project description:

std.process is improvements to the existing std.process and is a 
complete change to the API. The original API remains but these 
will be going through deprecation.

The major change is support for redirecting stdin/stdout/stderr

For those interested I took the unittests from the original 
std.process and modified them to the new API (back when it was 
under std.process2) so this diff gives an idea for changes (not 
done for Windows sorry).

https://gist.github.com/JesseKPhillips/5298688/revisions